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PostgreSQL PHP Generator online Help

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OnPageLoaded

This event occurs after the page is completely loaded from the server. It allows you, for example, to add additional filters to the dataset.

 

Signature:

function OnPageLoaded()

 

Parameters:

This method has no parameters.

 

Example 1

The following code is used in our Schema Browser Demo to filter database objects belonging to the selected database:

 

applyDatasetFilter($this->dataset);

 

Here applyDatasetFilter() is a function defined in the schema_browser_utils.php file as follows:

 

function applyDatasetFilter(Dataset $dataset) {

    if (GetApplication()->IsGETValueSet('database'))

        $value = GetApplication()->GetGETValue('database');

    else

        $value = ArrayUtils::GetArrayValueDef($_COOKIE, 'database');

    if (StringUtils::IsNullOrEmpty($value)) {

        $globalConnectionOptions = GetGlobalConnectionOptions();

        $value = $globalConnectionOptions['database'];

    }

    if (!StringUtils::IsNullOrEmpty($value)) {

        $dataset->AddFieldFilter('Database_name', new FieldFilter($value, '='));

        setcookie('database', $value);

    }

}

 

Example 2

The following code is used to filter countries by life expectancy:

 

// default values

$minLifeExpectancy = 40;

$maxLifeExpectancy = 90;

 

// checking values in the browser address line 

if (GetApplication()->isGetValueSet('minLifeExpectancy') &&

       GetApplication()->isGetValueSet('maxLifeExpectancy')) {

    $minLifeExpectancy = GetApplication()->GetGETValue('minLifeExpectancy');

    $maxLifeExpectancy = GetApplication()->GetGETValue('maxLifeExpectancy');

 

}  // or (if not found) in the session

elseif (GetApplication()->IsSessionVariableSet('minLifeExpectancy') && 

          GetApplication()->IsSessionVariableSet('maxLifeExpectancy')) {

    $minLifeExpectancy = GetApplication()->GetSessionVariable('minLifeExpectancy');

    $maxLifeExpectancy = GetApplication()->GetSessionVariable('maxLifeExpectancy');

}

 

// applying filter to the dataset

$this->dataset->AddCustomCondition(

    "life_expectancy >= {$minLifeExpectancy} ".

    "AND life_expectancy <= {$maxLifeExpectancy}");

 

// saving calculated values to the session

GetApplication()->SetSessionVariable('minLifeExpectancy', $minLifeExpectancy);

GetApplication()->SetSessionVariable('maxLifeExpectancy', $maxLifeExpectancy);

 

See also: OnPreparePage.



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